Lighting device



Jan. 10, w, w s 1,893,606

LIGHTING DEVICE Filed Aug. 21, 1929 2 Sheets-Sheet 1 filiruem on' M17or)? gys.

W. WILSON LIGHTING DEVICE Jan. 10, 1933.

Filed Aug. 21, 1929 2 Sheets-Sheet juenfor:

Patented Jan. 10, 1933 UNITED STATES PAT T OFFICE WESLEY WILSON, OFCHICAGO, ILLINOIS, ASSIGNORQTO WILSON LIGHTING, INC., OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS I LIGHTING DEVICEApplication filed August 21, 1929.

My invention relates to light devices. One of the objects of myinvention is to provide a cheap and efficient reflector for win- .dowand display lighting which will be adaptable to any standard electriclamp socket without the installation of a holding means between thesocket and the reflector other than that of the lamp itself. This has adecided advantage over the construction in common use at present in thatpractically all store windows are equipped with lamp sockets, while itis the duty of the tenant to supply a means for holding his reflectors.The installation of the present type of reflector holders requiresconsiderable time and trouble, while the cost of the holder itself isconsiderable and it must be of different lengths for different sizes oflamps.

A further object is to provide a reflector which scientifically controlsthe light and which will automatically maintain the lamp filament insubstantially the correct focal position when different sized lamps areused. With the type in common use at present the effectiveness of theunit is very often completely destroyed by inserting the wrong sizedlamp.

A further object is to provide a reflector that is adjustable withoutnecessitating movement of the lamp and socket.

A further object is to provide a cheap and efiicient color screen holderwhich will allow for shrinkage of the color screen or filter medium andstill hold it suificiently rigid to look neat.

A further object is to provide a reflector that is extremely easy totake down and install.

A further object is toprovide a reflector having a portion of itsreflecting surface cut away so as to permit the direct rays toilluminate at an angle of approximately 90 to the axis of the reflector.

Further objects will appear from the de scription and claims.

In the drawings, in which several embodi ments of my invent-ion aresh0wnflector adjustably mounted on a bulb;

Serial No. 387,447.

Fig. 2 is a view of the reflector as seen from the direction of thearrow 2 in Fig. 1; i

Fig. 3 is a section on the line 3-3 of Fig. 2 showing the adaptabilityof the mounting for different sizes of bulbs;

gig. 4 is an axial section of a modification; an I Fig. 5 is an axialsection of a still further modification.

Referring to the drawings in detail and first to Figs. 1, 2 and 3, theconstruction shown therein comprises an electric lamp 1 which may be ofany usual or suitable type mounted with its axis in vertical position, a

reflector 2 having a polished reflecting surface adjustably mounted onsaid bulb, and a color screen secured across the open side of thereflector to enable different colored lighting effects to be obtained.

The reflector has an elongated slot 4 through which the neck 5 of thebulb extends, the slot being so designed as to permit considerableangular adjustment of the reflector. In order to close that part of theslot 4 which is not being occupied by the neck of the bulb,

I provide a slidable closure member 6 having an opening 7 therethrough,the edge of which fits around the neck of the bulb. This closure member6 fits underneath the flanges 8 struck up from the material of thereflector and is slidably retained and guided by these flanges. In orderto hold the slidable closure in adjusted position a threaded stud 9 issecured to the reflector adjacent the edge of the slide and a clampingnut 10 is i inexpensive and eflicient adjustable polished 1 reflectormay be provided for any window and display installation in which thelamps extend downwardly from the sockets with their axes in substantialvertical position, without necessitating any additional holding meansbetween the socket and reflector other than the lamp itself.

Each spring wire gripping member comprises a circular portion 11 forengagement with the spherical portion of the lamp bulb and a pair ofspring arms 12 extending from this circular portion out throughsuit-ably placed openings in the sheet metal reflector, the ends 13being bent laterally along the outer surface of the reflector and bothbeing secured underneath a single rivet 14 which secures them to thereflector. As shown in Fig. 3, the construction is such as to enable thespring gripping members to readily accommodate bulbs 11 of considerablydifferent diameters, and also provides easy cleaning of the reflectingsurfaces.

In Fig. 4 is shown a simpler cheaper form of reflector in which theadjustable slide which fits around the neck of the bulb is omitted, thecolor screen also being omitted for the sake of simplicity andcheapness.

In Fig. 5 is shown a form in which the opening 15 through which the neckof the bulb extends fits snugly around the neck of the bulb but in whichno adjustment is provided except such as may be eflected by swinging thereflector about the axis of the bulb, the opening through which the neckextends being so located as to give the tie sired tilt to the reflector.In this form an opening 16 is provided in the reflector to per- -n1itdirect rays to escape to illuminate any sign or other display which maybe made on or near the window 17 betweenthe lines 18 and 19. In thisform, means are provided to prevent the striations which are usuallyformed by reason of the fact that the light source is not a point buthas a substantial extent. In order to prevent these striations, thereflector is made with a zoned wave formation, the curvature of eachzone being just suflicient to prevent the striations referred to. Inorder that each zone may receive approximately the same amount of li'ht, the zones are so designed that the angles A, B, C and D from thecenter of the light source to the meeting points of the diflerent zonesare substantially equal.

The color screen may be, if desired, formed of a. flexible sheet ofgelatine held in place in the annular recess of the reflector by meansof a resilient wire ring 20. This resilient ring 20 is so designed as tohold the edge of the sheet of gelatine with a light tension which willpermit a slight slippage of the edge of the gelatine sheet if the sheetcontracts due to the heating action of the lamp or other causes thuspreventing the gelatine sheets from being stretched to tlie point ofrupture. The ends of the resilient ring 20 may be bent outwardlyslightly to form finger-engaging pieces 22 to facilitate removal andreplacement of the ring and color screen. The color screen may beapplied in the first instance by taking a sheet of gelatine somewhatlarger than the size required to cover the opening, fitting it over theresilient ring and into the annular recess 21 in the reflectorpermitting the resilient ring to expand to grip the sheet and hold itagainst the surface or" the annular recess and thereafter trimming thesuperfluous portions of the gelatine sheet by means of shears or a knifeor any suitable instrument.

In order to prevent too great an angle of light spill through theopening provided for the neck of the lamp bulb, the sides may be formedupward as shown at 23 in Fig. 4.

In claim:

1. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through Whichthe neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,and means for supporting said reflector for swinging movement on saidbulb comprising a pair of opposed spring loop members embracing the bulbportion, said loop members lying on opposite sides of the plane throughthe center line of the slot and the light source.

2. The combination with an electric lamp having a contact base, a bulbportion, a'neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,and means for supporting said reflector for swinging movement on saidbulb comprisin a pair of opposed spring loop members embracing the bulbportion, said loop members lying on opposite sides of the plane throughthe center line of the slot and the light source, and said loop memberscomprising circular portions engaging the sides of the bulb and lying inplanes parallel to said center line plane.

3. The combination with an electric lamp having acontact base, a bulbportion, a neck portion connecting said bulb and base, and,

a. light source in the bulb portion, of a concavev reflector inwhichrthe bulb portion is located having an elongated slot through whichthe neck portion of the bulb extends, the side edges of which slot arespaced apart such a distance that they both lie close to the neckportion and the end edges of which are spaced apart such a distance asto permit a substantial movement of the reflector with respect to theneck portion, and means for supporting said reflector for swingingmovement on said bulb comprising a pair of opposed spring loop membersembracing the bulb portion, said loop members lying on opposite sides ofthe plane through the center line of the slot and the light source, saidloop members comprising circular portions engaging the sides of the bulband lying in planes parallel to said center line plane, and each loopmember comprising a pair of spaced arm portions secured to saidreflector and extending therefrom at points adjacent a side edge of saidslot.

4. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,and means for supporting said reflector for swinging movement on saidbulb comprising a pair of opposed spring loop members embracing the bulbportion, said loop members lying on opposite sides of the plane throughthe center line of the slot and the light source, and each loop membercomprising a pair of spaced arm portions secured to said reflector andextending therefrom at points adjacent the edge of said slot.

5. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,means for supporting said reflector for swinging movement on said bulb,and a shield having an opening through which the neck of the bulbextends slidably mounted on said reflector for covering the portion ofthe slot remote from the neck of the bulb.

6. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and'base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side to the neck portion, means forsupporting said reflector for swinging movement on said bulb comprisinga. pair of opposed spring loop members embracing the bulb portion, saidloop members lying on opposite sides of the plane through the centerline of the slot and the light source, and a shield having an openingthrough which the neck of the bulb extends slidably mounted on saidreflector for covering that portion of the slot remote from the neck ofthe bulb,

7. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,means for supporting said reflector for swinging movement on said bulb,and a shield having an opening through which the neck of the bulbextends slidably mounted on said reflector for covering the portion ofthe slot remote from the neck of the bulb, said shield lying outsidesaid reflector.

8. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends, the side edges of which slot are spacedapart such a distance that they both lie close to the neck portion andthe end edges of which are spaced apart such a distance as to permit asubstantial movement of the reflector with respect to the neck portion,and means for supporting said reflector for swinging movement on saidbulb comprising a pair of opposed spring members embracing the bulbportion therebetween and having a pivotal centering engagementtherewith, said spring members lying on opposite sides of a planethrough the center line of the slot and the light source.

9. The combination with an electric lamp having a contact base, a bulbportion, a neck portion connecting said bulb and base, and a lightsource in the bulb portion, of a concave reflector in which the bulbportion is located having an elongated slot through which the neckportion of the bulb extends,

the side edges of which slot are spaced apart such a distance that theyboth lie close to the neck portion and the end edges of which are spacedapart such a distance as to permit a substantial movement of thereflector with respect to the neck portion, and means for supportingsaid reflector for swinging movement on said bulbcomprising a pair ofopposed spring, centering members embracing the bulb portiontherebetween and having a pivotal centering engagement therewith, theline through the pivotal centers of said spring members beingsubstantially perpendicular to the plane through the center line of theslot and the light source.

In witness whereof, I have hereunto subscribed my name.

XVESLEY WILSON.

